Steam boiler



C. DE NOVO- May l, 1928.

STEAM BOILER Filled April 2. 1926 2 She'ets-Sheet 1 @GOGGG g May 1, 192s.

C. DE NOVO STEAM BOILER Filed April 2. 1926 2 Sheets-Sheet 2 @MZW ,EY iwf/M Patented May l, 129218.

i i i` 1,668,193

CHARLES DE Novo, or oAxrAmz, rumors.

STEAM BOILER.

Appnmmmed Aprile, 192e. serial No. 915,201.

. The invention relatesto steam boilers.

In the use of steam boilers, the joints between the fiues and the flue-sheet or boiler head often become loose due to the differential contraction and expansion of the flues and sheet caused by the Vtemperature vari-` ations in the water chamber and combustion chamber, and leakage of the Water into the combustion chamber results. The primary object of the present invention is to provide means for effectively preventing the flue joints of boilers from becomingloose. In general, this means comprises a `wall of irebrick which is disposed adjacent and contacts directly with the flue-sheet and operates to maintain the joints at a substantially uniform temperature regardless of the sharp variations in the temperature in the Water and combustion chambers.

The invention consists in the several'novel features hereinafter set forth and more particularly defined bythe claims at the conclusion hereof.

In the drawings: Fig. 1 is a rear View `of a boiler showing the new and improved brick-work applied to a portion of the fluesheet. Figs. 2 and 3 are detail perspectives of a brick which is used in the construction of the brickwork. Fig. 4 is a sectiontaken on the line 4 4 of Fi 1. Fig. 5 an enlarged section of the ue joints.

The invention is exemplified in aninter nally heated boiler comprising a cylindrical wall or body 5 which forms the outer shell and water chamber of the boiler; an annular fluesheet or head 6 which is riveted V or secured in any other suitable manner to one 'end of the wall 5 and forms the rear end of the boiler; a furnace 7 which is formed of a transversely corrugated pipe and has one end secured to theflue-sheet 6; a combustion chamber'I 9; and flues 10 which extend forwardly from the fine-sheet and are adapted to convey the products of combustion from the combustion chamber 9 and discharge them into a'stack (not shown) `as well understood in the art. The combustion chamber is formed by the fine-sheet 6, a base wall 11, a rear wall 12, side walls 13, and a top wall 14. The latter is com posed of members 15 which have their rear ends secured to the rear Wall 12 and their front ends secured to an angle bar 17 which extends horizontally across the flue-sheet and is rigidly secured thereto. Members 15 are arched and are adapted to direct the l products of combustion toward the fines.

Walls 11 12, 13 and 14are formed offir brick and may be of any suitable construction. An opening 19 is formed in therear wall 12 to permit access to the combustion contraction and expansion of the fines, a`

Wall 2() of fire-brick is formed against the rear surface of the fine-sheet 6. This wall is adapted to retain its heat and thus maintain the flue-sheet 6 and the flue joints at a substantially uniform temperature regardless of the sharp variations in the temperature in the combustion chamber 9 and the Water chamber. Wall 20 is composed of a course of solid arc-shaped bricks 21 which extend around the opening in the flue-sheet for the furnace 7; a course of solid bricks 23 which extend between bricks 21 and the side walls 13 of the combustion chamber, and terminate below the flue openings 6a; and a course of bricks 24 which extend up- Wardlyy from bricks 23 and terminate adja- Vcent the angle bar 17 and the top wall 14 of the combustion chamber. A pair of cylindrical openings 24a are formed in each brick 24 'and extend transversely there` through. These openings in bricks 24 are adapted to communicate with the flues so as to permit the products of combustion to escape from the combustion chamber to the Hues. The inner surface of each brick 24 is provided with an annular groove 24b ad jacent each opening 24a. These grooves form sockets into which the beaded ends of the fiues are secured. Wall 20 is contiguous to the Hue-sheet and is formed of a single thickness of bricks. v

The invention exemplifies a steam boiler in which a brick-Work is formedagainst the `Hue-sheet which Will maintain the flue-sheet and joints at a substantially uniform temperature, and thus prevent the joints from becoming loose due to differential expansion and contraction, resulting from variations intemperature in the combustion chamber `and Water chamber.

The invention is not to be understood as restricted to the details set forth, since these maybe modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a boiler, the combination of un oute r shell, a flue sheet, a combustion chamber adjacent one side of said sheet, flues extending through the sheet and leading from the chamber, and a Wall of lfire-brick disposed Within the combustion chamber and completely covering that part of the said one side of the sheet which is contiguous thereto, said Wall contacting directly with the flue connections and said part of the sheet and operating to maintain the connections and sheet at the same and a substantially uniorm temperature, the bricks of said wall adjacent the flues being provided with holes extending therethrough and in communication With the lues.

2. In a boiler, the combination of an outer shell, a ue sheet, a pnbustion chamber adjacent one sideof said sheet, ues extending through the sheet and leading from the chamber, said fiues being beaded over at said one side of the sheet to form Huid-ti ht joints between them and the sheet, an a Wall of ire-brick dis osed Within the combustion chamber an completely covering that part of the said one side of the sheet which is contiguous thereto, said wall contacting directl with said part of the sheet and the beade ends of the flues and operating to maintain the joints and sheet at the same and a substantiall uniform temperature, the bricks of saidy wall adjacent the joints being provided with holes extending therethrough and in communication with the flues, and socket-s for receiving the beaded ends.

Signed at Chicago, Illinois, this 19 day of March, 1926.

. CHARLES DE NOVO. 

